diff --git a/nx01-x4o-o2o/src/main/java/org/x4o/o2o/fc18/zion7/FourCornerZionStenoLexer.java b/nx01-x4o-o2o/src/main/java/org/x4o/o2o/fc18/zion7/FourCornerZionStenoLexer.java
index d20e4ef..7d39594 100644
--- a/nx01-x4o-o2o/src/main/java/org/x4o/o2o/fc18/zion7/FourCornerZionStenoLexer.java
+++ b/nx01-x4o-o2o/src/main/java/org/x4o/o2o/fc18/zion7/FourCornerZionStenoLexer.java
@@ -282,17 +282,20 @@ public class FourCornerZionStenoLexer {
 		private void handlePoints(List<Integer> slicedPoints) {
 			int denominatorBank[] = new int[64]; // <== is the terminator select per 9 bit group
 			int numeratorBank[] = new int[64];
-			boolean fired = false;
+			boolean errorZeroSparks = true;
+			boolean errorUnusedSparks = true;
 			for (Integer cakePoint : slicedPoints) {
 				if (cakePoint >= FourCornerDotCake.FC_NCR1632_XD.getStart() && cakePoint <= FourCornerDotCake.FC_NCR1632_XD.getStop()) {
 					int denominatorX = cakePoint - FourCornerDotCake.FC_NCR1632_XD.getStart();
 					denominatorBank[denominatorX / 512] = denominatorX % 512;
+					errorUnusedSparks = true;
 					continue;
 				}
 				int numeratorX = cakePoint - FourCornerDotCake.FC_NCR1632_XN.getStart();
 				numeratorBank[numeratorX / 512] = numeratorX % 512;
 				
 				if (cakePoint > FourCornerDotCake.FC_NCR1632_XN.getStart() + 512) {
+					errorUnusedSparks = true;
 					continue; // Only fire fraction on lowest value select
 				}
 				BigInteger denominator = BigInteger.ONE;
@@ -304,10 +307,15 @@ public class FourCornerZionStenoLexer {
 					numerator = numerator.add(BigInteger.valueOf(numeratorBank[i]).shiftLeft(i*9));
 				}
 				handler.strobeNCR1632(denominator, numerator);
-				fired = true;
+				errorZeroSparks = false;
+				errorUnusedSparks = false;
 			}
-			if (fired == false && smokeSignals != null) {
-				smokeSignals.burnInvalidNCR1632(currLine, currCol);
+			if (smokeSignals != null) {
+				if (errorZeroSparks) {
+					smokeSignals.burnNCR1632ZeroSparks(currLine, currCol);
+				} else if (errorUnusedSparks) {
+					smokeSignals.burnNCR1632UnusedSparks(currLine, currCol);
+				}
 			}
 		}
 	}
diff --git a/nx01-x4o-o2o/src/main/java/org/x4o/o2o/fc18/zion7/FourCornerZionStenoLexerSmoke.java b/nx01-x4o-o2o/src/main/java/org/x4o/o2o/fc18/zion7/FourCornerZionStenoLexerSmoke.java
index dd0409c..4f2af08 100644
--- a/nx01-x4o-o2o/src/main/java/org/x4o/o2o/fc18/zion7/FourCornerZionStenoLexerSmoke.java
+++ b/nx01-x4o-o2o/src/main/java/org/x4o/o2o/fc18/zion7/FourCornerZionStenoLexerSmoke.java
@@ -36,7 +36,9 @@ public interface FourCornerZionStenoLexerSmoke {
 	
 	void burnInvalidEscape(int line, int col, int cakePoint);
 	
-	void burnInvalidNCR1632(int line, int col);
+	void burnNCR1632ZeroSparks(int line, int col);
+	
+	void burnNCR1632UnusedSparks(int line, int col);
 	
 	interface Adapter extends FourCornerZionStenoLexerSmoke {
 		
@@ -57,7 +59,11 @@ public interface FourCornerZionStenoLexerSmoke {
 		}
 		
 		@Override
-		default void burnInvalidNCR1632(int line, int col) {
+		default void burnNCR1632ZeroSparks(int line, int col) {
+		}
+		
+		@Override
+		default void burnNCR1632UnusedSparks(int line, int col) {
 		}
 	}
 }
diff --git a/nx01-x4o-o2o/src/test/java/org/x4o/o2o/fc18/zion7/LexerNCRTest.java b/nx01-x4o-o2o/src/test/java/org/x4o/o2o/fc18/zion7/LexerNCRTest.java
index f15ebd3..c268999 100644
--- a/nx01-x4o-o2o/src/test/java/org/x4o/o2o/fc18/zion7/LexerNCRTest.java
+++ b/nx01-x4o-o2o/src/test/java/org/x4o/o2o/fc18/zion7/LexerNCRTest.java
@@ -22,7 +22,6 @@
  */
 package org.x4o.o2o.fc18.zion7;
 
-import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -30,9 +29,7 @@ import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 import org.x4o.o2o.fc18.FourCornerDotCake;
 import org.x4o.o2o.fc18.FourCornerUnicodeDisplay;
-import org.x4o.o2o.fc18.FourCornerUnicodeImport;
 import org.x4o.o2o.fc18.FourCornerX06BaklavaPoints;
-import org.x4o.o2o.fc18.pie9c.FCDotPIE9CDash26;
 import org.x4o.o2o.fc18.zero33.FCDotCDC1604DashP6;
 import org.x4o.o2o.fc18.zero33.FCDotDEC0127DashPX0;
 
@@ -44,22 +41,48 @@ import org.x4o.o2o.fc18.zero33.FCDotDEC0127DashPX0;
  */
 public class LexerNCRTest {
 	
-	int errorLine = -1;
+	SmokeReader SMOKE_READER = new SmokeReader();
+	
+	class SmokeReader implements FourCornerZionStenoLexerSmoke.Adapter {
+		
+		int errorNCRZeroSparks = -1;
+		int errorNCRUnusedSparks = -1;
+		
+		public void reset() {
+			errorNCRZeroSparks = -1;
+			errorNCRUnusedSparks = -1;
+		}
+		
+		@Override
+		public void burnNCR1632ZeroSparks(int line, int col) {
+			errorNCRZeroSparks = line;
+		}
+		
+		@Override
+		public void burnNCR1632UnusedSparks(int line, int col) {
+			errorNCRUnusedSparks = line;
+		}
+	};
 	
 	@Test
 	public void testNCRInvalid() throws Exception {
+		FourCornerZionStenoLexer lexer = new FourCornerZionStenoLexer(new FourCornerZion7Candlelier.Adapter() {}, true);
+		lexer.withSmokeSignals(SMOKE_READER);
 		List<Integer> cdc = new ArrayList<>();
 		cdc.add(FourCornerDotCake.FC_NCR1632_XD.getStart() + (512*63) + 1);
-		//cdc.add(FourCornerDotCake.FC_NCR1632_XN.getStart() - 1 + 123); // NXX_123
 		
-		FourCornerZionStenoLexer lexer = new FourCornerZionStenoLexer(new FourCornerZion7Candlelier.Adapter() {}, true);
-		lexer.withSmokeSignals(new FourCornerZionStenoLexerSmoke.Adapter() {
-			@Override
-			public void burnInvalidNCR1632(int line, int col) {
-				errorLine = line;
-			}
-		}).read(cdc);
-		Assertions.assertEquals(0, errorLine);
+		SMOKE_READER.reset();
+		lexer.read(cdc);
+		Assertions.assertEquals(-1, SMOKE_READER.errorNCRUnusedSparks);
+		Assertions.assertEquals(0, SMOKE_READER.errorNCRZeroSparks);
+		
+		cdc.add(FourCornerDotCake.FC_NCR1632_XN.getStart() - 1 + 123); // NXX_123
+		cdc.add(FourCornerDotCake.FC_NCR1632_XD.getStart() + (512*63) + 2);
+		
+		SMOKE_READER.reset();
+		lexer.read(cdc);
+		Assertions.assertEquals(0, SMOKE_READER.errorNCRUnusedSparks);
+		Assertions.assertEquals(-1, SMOKE_READER.errorNCRZeroSparks);
 	}
 	
 	@Test